RocketChat.Migrations.add
	version: 35
	up: ->
		RocketChat.models.Messages.update
			'file._id': {$exists: true}
			'attachments.title_link': {$exists: true}
			'attachments.title_link_download': {$exists: false}
		,
			$set:
				'attachments.$.title_link_download': true
		,
			multi: true
